<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div class="container">
        <ol>
            <li class="active"></li>
            <li></li>
            <li></li>
            <li></li>
        </ul>
    </div>
</body>
<style>
    *{
        padding: 0;
        margin: 0;
        box-sizing: border-box;
    }
    .container{
        position: relative;
        width: 500px;
        height: 200px;
        background-color: pink;
        margin: 100px auto;
    }
    .container ol {
        position: absolute;
        display: flex;
        right: 10px;
        bottom: 10px;
    }
    .container .active{
        background-color: rgba(255, 255, 255, 0.5);
    }
    .container ol li {
        width: 22px;
        height: 22px;
        padding: 4px;
        border-radius: 50%;
        margin-left: 10px;
        /* background-color: #fff; */
        list-style: none;
        /* box-sizing: content-box; */
        
    }
    .container ol li::after{
        content: '';
        display: block;
        width: 14px;
        height: 14px;
        /* box-sizing: content-box; */
        background-color: #fff;
        border-radius: 50%;
    }




</style>

</html>